The best selection both for the whole country and for the sub-regions is the case of "middle or large specifications of one couple one child for one generation fertility policy for another 15 years".

在全国层面和省区层面有着较大普遍性的优选方案是15年后实行中口径或大口径的一代独生子女政策。

youdao

Germany not only has low fertility now, but has had for more than a generation.

德国不仅是现在出生率低，而且是一直低了有一代人。

youdao

It takes another generation before the effect of smaller families-that is, of lower fertility-starts to show up in the overall population figures.

这得需要下一代家庭同样很小，人口出生率低，才能在总人口的数字上呈现出减少的迹象。

youdao

The generation in question is the one before the fertility fall really begins to bite, which in Europe and America was the baby-boom generation that is just retiring, and in China and East Asia the generation now reaching adulthood.

ECONOMIST: Demography